I just installed the latest build of Chromium on my MacBook because I wanted to use some of the new extensions available recently, but when I ran it, it had a blue title bar, like on Windows XP and Linux. I didn’t think too much of it, backed up the Chromium profile folder, and copied over my Chrome profile, and Chromium went back to grey.

After poking around and comparing the two Preference files, I figured out what was causing Chromium to go blue, there was an extension listed in the file, which the theme entry lower down referenced.

I did this using build 34868, and I cannot guarantee this will work for others, it just happened to work for me. If you do it wrong, or it doesn’t work, and it messes up your Chromium profile, I accept no responsibility. Backup the Default folder just in case this happens.

• Close Chromium, then go to ‘~/Library/Application Support/Chromium/Default/’
• Backup the Extensions folder and the Preferences file. If you make a mistake in the Preferences file, it deletes all the Extensions for some reason…
• Open up ‘Preferences’ in TextEdit (or whatever plain text editor you want to use).
• Find where it says ‘”settings”: {‘, it should be after ‘autoupdate’ under ‘extensions’
• Add in the following before ‘”settings”: {‘:
  “theme”: {
  “colors”: {
  “null”: [ 0, 0, 0 ]
  },
  “id”: “hkacjpbfdknhflllbcmjibkdeoafencn”,
  “pack”: “nopath”
  },

  and the following after:
  

  “hkacjpbfdknhflllbcmjibkdeoafencn”: {
  “location”: 1,
  “manifest”: {
  “key”: “MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCycmVJSXAf57FMqFmmTdmQtbvhYHx7850dYFcU9zyPMGgbpqDJ4PG8zFv3vqiVIwEkxoSCK/JbVdGUyenu5H4F8/e4+18rAjCMZffYEkXLme1ZkuirdhUD9KNobP+Y8wBUpQRsOEg8vpThjQaOovEI/u2AlSh9ckwDRKphqqwMNwIDAQAB”,
  “name”: “Default”,
  “theme”: {
  “colors”: {
  “null”: [ 0, 0, 0 ]
  },
  “images”: {
  “null”: “notused.png”
  }
  },
  “version”: “1.1″
  },
  “path”: “hkacjpbfdknhflllbcmjibkdeoafencn/1.1″,
  “state”: 1
  },

  so it’s like:
  

  “theme”: {
  “colors”: {
  “null”: [ 0, 0, 0 ]
  },
  “id”: “hkacjpbfdknhflllbcmjibkdeoafencn”,
  “pack”: “nopath”
  },
  “settings”: {
  “hkacjpbfdknhflllbcmjibkdeoafencn”: {
  “location”: 1,
  “manifest”: {
  “key”: “MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCycmVJSXAf57FMqFmmTdmQtbvhYHx7850dYFcU9zyPMGgbpqDJ4PG8zFv3vqiVIwEkxoSCK/JbVdGUyenu5H4F8/e4+18rAjCMZffYEkXLme1ZkuirdhUD9KNobP+Y8wBUpQRsOEg8vpThjQaOovEI/u2AlSh9ckwDRKphqqwMNwIDAQAB”,
  “name”: “Default”,
  “theme”: {
  “colors”: {
  “null”: [ 0, 0, 0 ]
  },
  “images”: {
  “null”: “notused.png”
  }
  },
  “version”: “1.1″
  },
  “path”: “hkacjpbfdknhflllbcmjibkdeoafencn/1.1″,
  “state”: 1
  },
• Save and open Chromium and hopefully you’ll have a blue title bar.

A lot of work for something so simple really… I wonder is there a theme available that’ll do this for you…